JP2013097168A5

JP2013097168A5 -

Info

Publication number: JP2013097168A5
Application number: JP2011239907A
Authority: JP
Filing date: 2011-11-01
Publication date: 2014-12-18
Anticipated expiration: 2031-11-01

Description

上記目的を達成するために、本発明のレンズ駆動ユニットは、レンズ装置内において該レンズ装置の光軸と垂直な方向にレンズを移動させるレンズ駆動ユニットであって、固定部材と、該レンズが固定された可動部材と、該可動部材と該固定部材が該レンズの光軸に垂直な方向において相対的に移動可能な態様で、該固定部材と該可動部材との間に挟持されるボールであって、前記固定部材又は前記可動部材に備えられたボール受け部と接触するボールと、該可動部材を該固定部材に向けて付勢する付勢手段と、該レンズの光軸に垂直な面内における該固定部材に対する該可動部材の位置を検出する位置検出手段と、該可動部材を該固定部材に対して光軸に垂直な方向に駆動する駆動手段と、該位置検出手段で検出された該可動部材の位置に基づいて、該駆動手段による該可動部材の駆動を制御する制御手段と、該レンズの光軸を中心とする該固定部材と該可動部材の相対的な回転位置によって、該光軸に垂直な平面内における該固定部材と該可動部材との相対的な可動範囲が大きい可動位置と、該平面内における該固定部材と該可動部材との相対的な可動範囲が小さい固定位置と、を画定する可動範囲画定手段と、を有し、前記該固定位置において、前記固定部材又は前記可動部材が備えるボール受け部と前記ボールとの間、又は前記駆動手段と前記可動部材との間において、摺動摩擦が発生する、ことを特徴とする。
In order to achieve the above object, a lens driving unit of the present invention is a lens driving unit that moves a lens in a direction perpendicular to the optical axis of the lens device in the lens device, and the fixing member and the lens are fixed. And a ball sandwiched between the fixed member and the movable member in such a manner that the movable member and the fixed member are relatively movable in a direction perpendicular to the optical axis of the lens. A ball in contact with the ball receiving portion provided on the fixed member or the movable member, a biasing means for biasing the movable member toward the fixed member, and an in-plane perpendicular to the optical axis of the lens Position detecting means for detecting the position of the movable member relative to the fixed member, driving means for driving the movable member in a direction perpendicular to the optical axis with respect to the fixed member, and the position detected by the position detecting means At the position of the movable member Zui and, control means for controlling the driving of the movable member by said drive means, by the relative rotational position of the fixing member and the movable member around the optical axis of the lens, a plane perpendicular to the optical axis A movable position that defines a movable position in which the relative movable range between the fixed member and the movable member is large and a fixed position in which the relative movable range between the fixed member and the movable member is small in the plane. has a range defining means, in the said locked position, said fixing member or between said ball and the ball receiving portion provided in the movable member, or between the said movable member said driving means, it is sliding friction It is generated .

Claims

In the lens device, a lens driving unit that moves the lens in a direction perpendicular to the optical axis of the lens device,
A fixing member;
A movable member to which the lens is fixed;
A ball sandwiched between the fixed member and the movable member in a manner in which the fixed member and the movable member are relatively movable in a direction perpendicular to the optical axis of the lens, A ball in contact with a ball receiving portion provided in the movable member ;
Biasing means for biasing the movable member toward the fixed member;
Position detecting means for detecting the position of the movable member relative to the fixed member in a plane perpendicular to the optical axis of the lens;
Drive means for driving the movable member in a direction perpendicular to the optical axis with respect to the fixed member;
Control means for controlling the driving of the movable member by the driving means based on the position of the movable member detected by the position detecting means ;
The relative movable position of the fixed member and the movable member around the optical axis of the lens is movable so that the relative movable range of the fixed member and the movable member in a plane perpendicular to the optical axis is large. Movable range defining means for defining a position and a fixed position where a relative movable range of the fixed member and the movable member in the plane is small ;
Have
In the fixed position, sliding friction occurs between the ball receiving portion provided in the fixed member or the movable member and the ball, or between the driving means and the movable member.
A lens driving unit.

The lens driving unit according to claim 1 , wherein the driving unit is a vibration wave motor.

The lens driving unit according to claim 1 , wherein the driving unit is a voice coil motor.

Lens drive unit according to any one of claims 1 to 3 wherein the biasing means comprises a permanent magnet fixed to one of said movable member and said fixed member, it is characterized.

When the movable member moves from a predetermined reference position at the fixed position, the position detecting means detects the amount of movement of the movable member from the reference position, and moves the position of the movable member to the reference position. lens drive unit according to any one of claims 1 to 4 for controlling the drive means, it is characterized in.

Lens apparatus having a lens drive unit according to any one of claims 1 to 5.

An imaging device comprising the lens device according to claim 6 .